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. 2018 Jul 2;150(7):911–932. doi: 10.1085/jgp.201812090

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© 2018 Bezanilla

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Figure 2. — The capacitive current and its components. The current needed to charge or discharge the membrane capacitance has two components. The charging of the capacitor plates is provided by the mobile ions in solution, and the charge carried by the current is a linear function of the voltage (left panel), whereas inside the membrane (right panel), the charge is a nonlinear function of voltage because the mobile dipoles or charges reach their extreme positions at high voltages.